Title :
Propagation of Wide-Band Signals at VHF/UHF
Author :
Cameron, Alan G.
Author_Institution :
Teledyne Brown Eng., Lexington, MA
fDate :
9/1/1985 12:00:00 AM
Abstract :
The experimental jam-resistant secure voice communications (JRSVC) system developed by M.I.T. Lincoln Laboratory was used to conduct a series of VHF/UHF (225-400 MHz) propagation measurements, representative of a veriety of tactical communications situations, both ground to ground and ground to low-flying aircraft. Results are unusual in two regards: they were made with the receiver in motion, covering many contiguous propagation paths, and the JRSVC system, by frequency-hopping over almost an octave and averaging the results, largely eliminated the effects of frequency-selective (multipath) fading that generally dominate VHF/UHF propagation measurements.
Keywords :
Aircraft communications; Frequency-hop communication; UHF radio propagation; VHF radio propagation; Bandwidth; Fading; Frequency measurement; Frequency synchronization; Laboratories; Testing; Transceivers; UHF measurements; UHF propagation; Wideband;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC.1985.1146262